Megohmmeter 0-2000 Ohm Real Digital Earth Tester DY4100 Ground Resistance Meter
DY4100 Digital Ground Resistance Tester. Digital earth resistance tester DY4100 is a new generation tester for electrician practice which is developed by DUOYI in recent years. The circuit, structure and technique of traditional earth resistance tester have been improved and the new design is both fine-looking and practical.